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Structure, mechanics, electricity, calorifics, radialization and chemicalproperties are reviewed for polyperfluoroethylene-propylene and tetrafluoroethylene perfluoroalkyl vinyl ether copolymer.

了聚全氟乙丙四氟乙全氟代烷基乙基醚共聚构和力学热学、辐射、化学性能。

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Now if you change all four of the hydrogens on the base ethylene with fluorine it becomes tetrafluoroethylene.

现在,如果你变基乙烯所有四个氢, 它就会变成乙烯

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handglass, hand-goniometer, handgravure, hand-grenade, handgrip, handguard, handgun, hand-handling, hand-held, handhold,

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